Learn how to create this graph here.
Windroses are used to present wind speed data and wind direction data that has been collected over some time, so that the dominant wind pattern for a particular area can be determined. Windroses are also useful as they project a large quantity of data in a simple graphical plot. In this case, we use wind rose plots to compare observed wind data against wind data that has been calculated from a computer model. The time period is one month and the data are hourly averages. The length of each "arm" is proportional to the fractional frequency at which that wind speed (and below) was observed from that direction. Different colors on each "arm" indicate the wind speed. For example, in the left windrose, most winds came from the south to southwest, but winds with higher wind speeds came from the west.
This graph is an adaptation of the polar plot option in Origin. The raw wind data are processed externally and a matrix of the counts with respect to wind speed and direction are imported into origin. LabTalk scripts process the data, load the plot template and insert the data. This process is entirely automated and windrose plots are generated and formatted (names, dates, percentages etc.) automatically for up to 18 different sites.
Dr. Aaron Wiegand
Center for Instrumental & Develop. Chem.
"E" Block, Gardens Point Campus
Queensland University of Technology
GPO Box 2434, Brisbane 4001, AUSTRALIA